Filling mixing motion for shuttleless rapier looms

ABSTRACT

This invention relates to a filling mixing motion for rapiertype shuttleless looms with two filling feeding fingers which alternately position one of two filling threads, leading from two supply packages outside of the warp shed to the cloth selvage to which they are connected, to a taking or pickup position where said filling thread is caught by a filling carrier.

United States Patent [72] Inventor Paul Haltmeier Bragg, Switzerland [21] App]. No. 886,437

[22] Filed Dec. 19, 1969 [45] Patented Oct. 5, 1971 [73] Assignee George Fischer Ltd., Brugg Bragg, Aargau, Switzerland [32] Priority May 8, 1969 [33] Switzerland [54] FILLING MIXING MOTION FOR SHUTTLELESS RAPIER LOOMS 2 Claims, 3 Drawing Figs.

[52] U.S.Cl...... .1 139/122 [51] Int. CL. D031! 47/38 [50] Field otSear-ch 139/122, 1, 127

[56] References Cited UNITED STATES PATENTS 2,749,946 6/1956 Pfarrwaller 139/122 3,511,284 5/1970 Tosches 139/122 Primary ExaminerHenry S. .laudon Attorney-Rodney C. Southworth ABSTRACT: This invention relates to a filling mixing motion for rapier-type shuttleless looms with two filling feeding fingers which alternately position one of two filling threads, leading from two supply packages outside of the warp shed to the cloth selvage to which they are connected, to a taking or pickup position where said filling thread is caught by a filling carrier.

FILLING MIXING MOTION FOR SI'IUTTLELESS RAPIER LOOMS BACKGROUND OF THE INVENTION After the spinning process the twist or thickness of the yarn to be woven may be irregular. It is also possible that variations in color occur from cone or package dyeing. When weaving off one filling supply package after the other, lines or bars will be produced in the cloth which render its quality inacceptable. For this reason it is advantageous to weave with a filling mixing motion.

Filling mixing motions of the prior art incorporate a large number of movable parts which are highly subject to contamination and to wear. These motions which are usually adapted from color motions are complicated enough to cut down the speed of weaving below that at which the loom might otherwise function. Accordingly, it is an object of the invention to devise a filling mixing motion of simple and robust design and which allows with such simple means, to vary the continuous filling mixing relation according to requirements.

SUMMARY OF THE INVENTION The filling motion under reference works with the same general principle as for instance, the multicolor filling motion as per the Swiss Pat. No. 465,524 by which, in a patterned sequence, one of the four different filling threads is guided from a waiting position to a pickup position. The invention is characterized by the fact that two filling feeding fingers, each one mounted in its own pivot stud and having at its end a filling eyelet, are connected with each other for constrained operation and that the two filling fingers or their filling eyelets, respectively, can be brought alternately to the mutual filling taking position or out of this position, respectively, by a mutual cam control motion which is driven by the shuttleless loom.

The invention will appear more clearly from the following detailed description when taken in connection with the accompanying drawings showing by way of example, a preferred embodiment of the inventive idea, wherein:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a view of the inventive filling mixing motion seen in direction of filling insertion,

FIG. 2 is a view as per FIG. I seen at right angles to the direction of filling insertion, partly in section, and

FIG. 3 is a portion of the view of the control cam, in section, showing the alternative for filling mixing in 2X2. DESCRIP- TION OF THE PREFERRED EMBODIMENT The filling fingers 1 and 2, FIG. 1, are each borne for rotation in a stud 4 or 5, respectively, said studs being fixed to a loomside 3, and arranged in such a way that one of the filling eyelets'6 or 7, respectively, provided in the fingers l and 2 (in FIG. 1 it is the eyelet 6) keeps a filling thread 8, which at this moment is not active in the weaving process, away from a filling depressor 9, whereby the filling eyelets 6 or 7 move in an arclike path to and from a mutual filling pickup position (in FIG. 1 at filling eyelet 7).

The filling finger 1 has a lever 10 with a forklike slide guide in which a sliding block 11 is guided and which is connected by a stud 13 fixed in the upright lever 12 of filling finger 2. The block 11 is free to slide in guide 20 and the stud 13 is free to rotate in a bearing in the block. The filling finger 2 is connected for operation from cam 16 by means of roller 15 being fixed to a further lever 14, said cam being positively driven by the loom by means (not shown) via shaft 17 so that the cam carries out a quarter rotation per pick of the loom.

This connection for operation can also be obtained by other means not shown in the drawings, such as e.g. with gear seg ments or with a connecting rod.

In consequence of the arrangement of the levers l0 and 12, the movement of the filling fingers l and 2 is always in opposite direction so that alternately, there is alwa s one of the two filling threads (21 in FIG. 2) guided to the fi ling presenting and pickup position 7 and the other one (8) kept away from it (position 6, 7, or 6, 7').

The cam 16 shown in FIG. 1 will alternate the filling fingers l and 2 and thus alternately present the two filling threads, that is, make a filling change, after every pick of the loom. By loosening setscrew 18 the cam 16 as per FIG. 1, can be replaced in a simple way by another cam 19, FIG. 3, which will alternate the filling fingers l and 2, and thus present first one and then the other of the two filling threads only after every second pick of the loom.

One advantage of the inventive filling mixing motion over other devices of the prior art is the possibility of operating with a higher number of picks per minute. Furthennore, the design under reference is simpler and less expensive, i.e. this is a more economical solution than, for instance, the controlled multicolor filling motion. By means of the easily interchangeable cam it it possible to vary the mixing relation in a simple manner according to requirements.

This disclosure of a preferred embodiment of the invention is to be interpreted as illustrative only. The invention is not to be restricted except by the scope of the appended claims wherein the novel features desired to be protected by Letters Patent are set forth:

lclaim:

l. A filling mixing motion for rapier-type shuttleless looms having at least two stationary sources of filling located outside the shed of a fabric being woven and reciprocating filling carriers functioning to draw filling from said sources as presented to one of the carriers to insert that filling as a completed pick, in a sequence of picks from one source and then from the other, characterized by, two separate pivot studs, two filling feeding fingers, one pivoted at each said stud and having a filling eyelet in each finger end so devised that the fingers may be moved to and from a position in which the eyelets occupy a substantially common feeding point, complementary arms, one for each finger and pivoted at the same stud as its finger, said arms having ends which overlap in their paths of movement and a common actuating means interconnecting said arm ends for moving one finger from the movements of the other alternately to and from filling feeding position, and cam and follower means to impart movement to one said feeding finger.

2. Mechanism as defined in claim 1 wherein, said common, actuating means comprises a sliding block, a slot in one arm for said block and a pivot pin carried by the other arm and passing through the block. 

1. A filling mixing motion for rapier-type shuttleless looms having at least two stationary sources of filling located outside the shed of a fabric being woven and reciprocating filling carriers functioning to draw filling from said sources as presented to one of the carriers to insert that filling as a completed pick, in a sequence of picks from one source and then from the other, characterized by, two separate pivot studs, two filling feeding fingers, one pivoted at each said stud and having a filling eyelet in each finger end so devised that the fingers may be moved to and from a position in which the eyelets occupy a substantially common feeding point, complementary arms, one for each finger and pivoted at the same stud as its finger, said arms having ends which overlap in their paths of movement and a common actuating means interconnecting said arm ends for moving one finger from the movements of the other alternately to and from filling feeding position, and cam and follower means to impart movement to one said feeding finger.
 2. Mechanism as defined in claim 1 wherein, said common, actuating means comprises a sliding block, a slot in one arm for said block and a pivot pin carried by the other arm and passing through the block. 